We've read a lot lately about the value of swift, full, and forthright apologies when public figures screw up. What about companies that screw up? Blippy is a website that lets users trade updates about their consumer purchases. Recently, an obscure programming error, compounded by mistakes at Google and one small midwestern bank, allowed Google to index the credit card numbers of four or five Blippy customers, potentially exposing these numbers to people browsing the web. Co-founder & CEO Ashvin Kumar's apology to users could serve as a model for companies that find themselves in a similar pickle. Moneyquote: It has been...